Senator-elect Mitt Romney (R-UT) attacked President Donald Trump’s “character” in an op-ed Tuesday evening in the Washington Post.

“His conduct over the past two years, particularly his actions this month [December], is evidence that the president has not risen to the mantle of the office,” Romney wrote.

And yet Romney — who ran in a safe Utah seat rather than in Massachusetts, where he had once been governor, and might have helped Republicans by taking on a Democratic presidential contender — sought, and accepted, Trump’s endorsement for Senate in 2018.

Here is a brief summary of Romney’s history of backstabbing Trump — often after seeking, and receiving, his help:

Romney’s op-ed re-ignited speculation that he intends to run for president again, perhaps against Trump himself.

An observer at Romney’s speech in March 2016 said: “This is just Act One” for Romney.

Clearly, he was right.

Joel B. Pollak is Senior Editor-at-Large at Breitbart News. He is a winner of the 2018 Robert Novak Journalism Alumni Fellowship. He is also the co-author of How Trump Won: The Inside Story of a Revolution, which is available from Regnery. Follow him on Twitter at @joelpollak.